Firearm attachment assembly, member for attaching and method of securing

ABSTRACT

A firearm attachment assembly is provided. The firearm attachment assembly includes an upper mounting portion and a lower mounting portion. Each portion has an inner surface. Also, the firearm attachment assembly includes a layer affixed to and covering at least a portion of the inner surface of the upper mounting portion and at least a portion of the inner surface of the lower mounting portion. A member and a method of attaching the firearm attachment assembly is also provided.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is claiming the benefit, under 35 U.S. C. 119(e), of the provisional application which was granted Ser. No. 61/565,110 filed on Nov. 30, 2011 and the provisional application which was granted Ser. No. 61/615,686 filed on Mar. 26, 2012, the entire disclosures of which are hereby incorporated by reference.

BACKGROUND OF THE INVENTION

A Weaver or Picatinny rail is utilized for attaching various accessories onto a weapon such as a rifle, shotgun, handgun, or crossbow. These types of rails typically extend in a generally longitudinal direction for aligning an accessory parallel to the weapon bore.

Typically, the accessory is mounted to the Weaver or Picatinny rail. Mounts known in the art are clamped together and may be clamped onto the rail. Thus, these mounts utilize compressive force to be assembled and/or to be attached to the rail. Unfortunately, these mounts do not provide the accessory in exactly the same orientation each time the accessory is mounted. If the accessory is an optical scope, it is very important that the orientation of the scope, relative to the gun bore, be consistent to avoid having to sight in the gun each time the scope is removed and reattached. Also, known mounts are traditionally made of materials that can scratch and/or dent the accessory when, for example, the accessory is mounted to or when the accessory is removed from the mount.

Thus, it would be desirable to provide an attachment assembly, a member for attaching and a method for securing the attachment assembly to a weapon that allows the accessory to be consistently and precisely oriented each time the accessory is mounted. Also, it would be desirable to provide an assembly which can mount an accessory to the weapon without denting or scratching the accessory.

BRIEF SUMMARY OF THE INVENTION

The present invention is directed to a firearm attachment assembly, a member for the firearm attachment assembly, and a method for securing an attachment assembly to a weapon.

In one embodiment, the firearm attachment assembly comprises an upper mounting portion and a lower mounting portion. Each portion has an inner surface. Also, the firearm attachment assembly comprises a layer affixed to and covering at least a portion of the inner surface of the upper mounting portion and at least a portion of the inner surface of the lower mounting portion.

In one embodiment, the member for a firearm attachment assembly comprises a portion which tapers from a first end to a middle portion and a threaded portion attached to the middle portion.

In one embodiment, the method for securing an attachment assembly to a weapon comprises providing an attachment assembly. The attachment assembly comprises a passage formed there through. Also, the method comprises positioning the attachment assembly over a slot in a rail such that the passage is aligned with the slot and inserting a member into the passage and between opposite sides of the slot to secure the attachment assembly to the rail.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

FIG. 1 is a perspective view of an embodiment of an attachment assembly in accordance with the invention;

FIG. 2 is a plan view of the attachment assembly of FIG. 1;

FIG. 3 is a cross-sectional view taken along line 3-3;

FIG. 4 is a perspective view of a portion of the embodiment of the attachment assembly of FIG. 1;

FIG. 5 is a cross-sectional view taken along line 5-5;

FIG. 6 is a perspective view of an embodiment of a member in accordance with the invention;

FIG. 7 is a perspective view of the embodiment of the attachment assembly of FIG. 1 attached to a rail.

FIG. 8 is a rear perspective view of an embodiment of an attachment assembly in accordance with the invention partially exploded;

FIG. 9 is a front plan view of the attachment assembly of FIG. 8;

FIG. 10 is a rear perspective view of the attachment assembly of FIG. 8 partially exploded;

FIG. 11 is an exploded perspective view of the attachment assembly of FIG. 8;

FIG. 12 is a cross-sectional view of an embodiment of an attachment assembly in accordance with the invention;

FIG. 12A is a cross-sectional view of a portion of an embodiment of an attachment assembly in accordance with the invention;

FIG. 13 is a perspective view of a portion of an embodiment of an attachment assembly in accordance with the invention;

FIG. 14 is a rear plan view of an embodiment of an attachment assembly in accordance with the invention;

FIG. 15 is a cross-sectional view of the attachment assembly of FIG. 14;

FIG. 16 is a front perspective view of an embodiment of an attachment assembly in accordance with the invention;

FIG. 17 is an exploded perspective view of the attachment assembly of FIG. 14;

FIG. 18 is a bottom perspective view of the attachment assembly of FIG. 14 partially exploded;

FIG. 19 is a front plan view of the attachment assembly of FIG. 14 partially exploded and positioned over a rail;

FIG. 20 is a front plan view of the attachment assembly of FIG. 14 partially exploded and positioned over a rail;

FIG. 21 is a front plan view of the attachment assembly of FIG. 14 positioned over a rail;

FIG. 22 is a front plan view of the attachment assembly of FIG. 14 attached to a rail;

FIG. 23 is a perspective view of a riser having a single slot; and

FIG. 24 is a perspective view of a riser having a plurality of slots.

DETAILED DESCRIPTION OF THE INVENTION

It is to be understood that embodiments of the invention may assume various alternative orientations and step sequences, except where expressly specified to the contrary. It is also to be understood that specific accessories, the assemblies, members and methods illustrated in the attached drawings and described in the following specification are simply exemplary embodiments of the inventive concepts. Hence, specific dimensions, directions, or other physical characteristics relating to the embodiments disclosed are not to be considered as limiting, unless expressly stated otherwise. Also, although they may not be, like elements in various embodiments may be commonly referred to with like reference numerals within this section of the application.

Embodiments of a firearm attachment assembly 30, 30A, 30B, 30C, 30D are described herein and illustrated in FIGS. 1-22. Although the attachment assembly 30, 30A, 30B, 30C, 30D will be described for mounting an accessory (not depicted) to a firearm (not depicted), it should be appreciated that the attachment assembly may have many uses, may be utilized in many applications and/or may be utilized with weapons other than firearms. For example, the attachment assembly 30, 30A, 30B, 30C, 30D can be utilized with a crossbow (not depicted). Thus, the attachment assembly 30, 30A, 30B, 30C, 30D is not limited to only firearm applications.

However, in certain embodiments, the attachment assembly 30, 30A, 30B, 30C, 30D is configured to be secured to a firearm. In these embodiments, the firearm attachment assembly 30, 30A, 30B, 30C, 30D described herein is not limited to use with a particular type of firearm. For example, the firearm attachment assembly 30, 30A, 30B, 30C, 30D may be utilized to mount a sight scope (not depicted) to a rifle (not depicted). Alternatively, the firearm attachment assembly 30, 30A, 30B, 30C, 30D may be utilized to mount a sight scope to a handgun (not depicted).

As shown, for example, in FIG. 7, the firearm attachment assembly 30, 30A, 30B, 30C, 30D may be utilized for mounting an accessory to a Weaver or a Picatinny rail 500 attached to the firearm. However, it should be appreciated that the attachment assembly 30, 30A, 30B, 30C, 30D may be utilized with other rail types, risers or, in certain embodiments (not depicted), to mount the accessory directly to the firearm. Also, although in FIG. 7 only one firearm attachment assembly 30 is attached to the rail 500, it should be appreciated that a plurality of firearm attachment assemblies 30, 30A, 30B, 30C, 30D can be utilized to mount an accessory to the rail 500. For example, two firearm attachment assemblies 30 may be utilized to mount an accessory to the rail 500. Additionally, the various embodiments of the firearm attachment assembly 30, 30A, 30B, 30C, 30D described herein can be utilized together to mount an accessory.

Additionally, while the firearm attachment assembly 30, 30A, 30B, 30C, 30D will be described for use in mounting a sight scope to a firearm, the assembly 30, 30A, 30B, 30C, 30D is not limited to mounting a specific type of accessory to the firearm. For example, any of a tactical light, laser aiming module, night vision device, reflex sight, foregrip, pistol grip, bipod, bayonet, optical scope or a telescopic scope can be mounted to a firearm using the attachment assembly 30, 30A, 30B, 30C, 30D described herein. It should also be appreciated that additional accessories not above-listed are capable of being mounted to a firearm utilizing the attachment assembly 30, 30A, 30B, 30C, 30D.

The firearm attachment assembly 30, 30A, 30B, 30C, 30D comprises an upper mounting portion 34 and lower mounting portion 36, 36A, 36B, 36C, 36D. Advantageously, the upper mounting portion 34 and lower mounting portion 36, 36A, 36B, 36C, 36D are more resistant to wear and less susceptible to degradation by oil and/or solvents than known designs.

In an embodiment, the upper mounting portion 34 and lower mounting portion 36, 36A, 36B, 36C, 36D each comprise carbon fibers. Preferably, each portion 34, 36, 36A, 36B, 36C, 36D comprises at least 30% carbon fiber by weight. However, it should be appreciated that additional or alternative materials may be utilized in forming these portions 34, 36, 36A, 36B, 36C, 36D. For example, in certain embodiments, the upper and lower mounting portions 34, 36, 36A, 36B, 36C, 36D comprise nylon and glass.

With reference to FIGS. 1-5, the upper mounting portion 34 has an inner surface 38 and an outer surface 40. The lower mounting portion 36, 36A, 36B, 36C, 36D has an inner surface 42 and an outer surface 44. In certain embodiments, the inner surfaces 38, 42 each have a semi-circular shape. However, it should be appreciated that the inner surfaces 38, 42 of the mounting portions 34, 36, 36A, 36B, 36C, 36D are not limited to being of a semi-circular shape.

In an embodiment, the firearm attachment assembly 30, 30A, 30B, 30C, 30D comprises an upper overmolding 46 and a lower overmolding 48. The upper overmolding 46 comprises an upper layer 50. The upper layer 50 is disposed on the inner surface 38 of the upper mounting portion 34. The lower overmolding 48 comprises a lower layer 52. The lower layer 52 is disposed on the inner surface 42 of the lower mounting portion 36, 36A, 36B, 36C, 36D.

The upper layer 50 is affixed to the inner surface 38 of the upper mounting portion 34 and the lower layer 52 is affixed to the inner surface 42 of the lower mounting portion 36, 36A, 36B, 36C, 36D. Preferably, the upper layer 50 is permanently affixed to the inner surface 38 of the upper mounting portion 34 and the lower layer 52 is permanently affixed to the inner surface 42 of the lower mounting portion 36. When permanently affixed to the inner surfaces 38, 42, the upper layer 50 and lower layer 52 do not separate from the inner surfaces 38, 42 to which they are affixed. Additionally, in certain embodiments, the upper layer 50 and lower layer 52 do not move relative to the inner surfaces 38, 42 to which each is affixed.

The upper layer 50 covers at least a portion of the inner surface 38 of the upper mounting portion 34. The lower layer 52 covers at least a portion of the inner surface 42 of the lower mounting portion 36, 36A, 36B, 36C, 36D. In certain embodiments, the upper layer 50 covers substantially all of the inner surface 38 of the upper mounting portion 34 and the lower layer 52 covers substantially all of the inner surface 42 of the lower mounting portion 36, 36A, 36B, 36C, 36D.

The upper and lower layers 50, 52 may be affixed to the inner surfaces 38, 42 of the upper and lower mounting portions 34, 36, 36A, 36B, 36C, 36D via a chemical bond. In other embodiments (not depicted), an adhesive layer may be disposed between the upper layer 50 and the upper mounting portion 34 and an adhesive layer may be disposed between the lower layer 52 and the lower mounting portion 36, 36A, 36B, 36C, 36D to affix each layer 50, 52 to an inner surface 38, 42 thereof. In still other embodiments, the upper layer 50 is affixed to the inner surface 38 via an interlock between the upper overmolding 46 and the upper mounting portion 34 and the lower layer 48 is affixed to the inner surface 42 via an interlock between the lower overmolding 48 and the lower mounting portion 36, 36A, 36B, 36C, 36D.

As shown, for example, in FIGS. 3 and 5, in an embodiment, the upper overmolding 46 comprises one or more anchor portions 54. Also, as shown in FIG. 5, in an embodiment, the lower overmolding 48 comprises one or more anchor portions 56, 57. In an embodiment, the upper overmolding 46 comprises one anchor portion 54 and the lower overmolding 48 comprises a plurality of anchor portions 56, 57. In these embodiments, the upper overmolding 46 is disposed on the inner surface 38 and extends from the inner surface 38 to the outer surface 40 of the upper mounting portion 34. Additionally, the lower overmolding 48 is disposed on the inner surface 42 of the lower mounting portion 36 and between the inner surface 42 and the outer surface 44 of the lower mounting portion 36, 36A, 36B, 36C, 36D. The anchor portions 54, 56, 57 interlock the overmoldings 46, 48 with the upper mounting portion 34 and lower mounting portion 36, 36A, 36B, 36C, 36D, respectively.

The anchor portion(s) 54, 56, 57 can be of any suitable size and shape for interlocking the upper overmolding 46 to the upper mounting portion 34 and the lower overmolding 48 to the lower mounting portion 36, 36A, 36B, 36C, 36D. In an embodiment, certain anchor portions 56 may be of generally cylindrical in shape. However, it should be appreciated that the assembly 30, 30A, 30B, 30C, 30D is not limited to anchor portion(s) 56 having a generally cylindrical shape. For example, in certain embodiments, an anchor portion 57 having a generally triangular or frusto-conical shape may be utilized. Further, it should be appreciated that anchor portions of different shapes and/or sizes can be utilized together in certain embodiments.

In certain embodiments, a neck portion 58, 60 is attached to an anchor portion 54, 56 on an end of the neck portion 58, 60. On an opposite end, the neck portion 58, 60 is attached to one of the layers 50, 52. Thus, the neck portion 58, 60 connects the anchor portion 54, 56 to the layer 50, 52.

Preferably, the neck portions 58, 60 have a width 62, 63 and a length 64, 65. As shown in FIG. 5, the neck portions 60 of the lower overmolding 48 may be of a generally rectangular shape such that the length 65 is greater than the width 63 of each neck portion 60. In other embodiments, certain anchor portions 56 may have a diameter 66. In these embodiments, the diameter 66 of certain anchor portions 56 may be greater than the width 63 of the neck portion 60 attached thereto.

Preferably, each anchor portion 54, 56, 57 and neck portion 58, 60 is formed in a groove 68, 70, 71 provided in the either of the upper mounting portion 34 or the lower mounting portion 36, 36A, 36B, 36C, 36D. Each groove 68, 70, 71 comprises walls 72, 74, 75 which are immediately adjacent and may be in contact with an anchor portion 54, 56 and/or a neck portion 58, 60. In certain embodiments like the one shown in FIG. 5, an anchor portion 56 and neck portion 60 may be surrounded by the walls 74 of a groove 70. In other embodiments, an anchor portion 54 and neck portion 58 may be at least partially surrounded by the walls 72 of a groove 68.

The overmoldings 46, 48 may be formed by any suitable method. For example, the overmoldings 46, 48 may be formed by machining. However, in certain embodiments, the overmoldings 46, 48 are formed by an injection process. As such, the overmoldings 46, 48 may be formed of materials suitable for being injected into the grooves 68, 70.

Preferably, the upper and lower overmoldings 46, 48 are comprised of materials such that the layers 50, 52 have a hardness value which is less than that of the upper mounting portion 34 and lower mounting portion 36,36A, 36B, 36C, 36D. In certain embodiments, the layers 50, 52 have substantially the same hardness value. In these embodiments, each layer 50, 52 may have a hardness value of at least 80 durometers. In other embodiments, each layer 50, 52 has a hardness value of at least 90 durometers. It should be appreciated that although the layers 50, 52 have a hardness value which is less than that of the upper and lower mounting portions 34, 36, 36A, 36B, 36C, 36D, the layers 50, 52 are sufficiently durable for use in mounting an accessory to a firearm and supporting the accessory over multiple uses.

When mounted, the accessory is in contact with the layers 50, 52 and held in place by friction. Advantageously, the accessory is not scratched or dented by the firearm attachment assembly 30, 30A, 30B, 30C, 30D. This is due at least in part to the elasticity, durability and coefficient of fiction of the layers 50, 52 which is similar to natural rubber compounds. The material for the layers 50, 52 may also be selected so that the layers 50, 52 can withstand temperatures of both hot and cold environments.

Preferably, the upper layer 50 and lower layer 52 are comprised of the same or substantially the same material(s). In an embodiment, the upper layer 50 and lower layer 52 may comprise a composite material. Preferable composite materials for forming the layers 50, 52 are thermoplastic elastomers such as Santoprene™ or the like.

As illustrated, for example, in FIGS. 1-5, each layer 50, 52 may be formed in a substantially uniform manner. As such, when the inner surface 38 of the upper mounting portion 34 and the inner surface 42 of the lower mounting portion 36, 36A, 36B, 36C, 36D have a semi-circular shape, the upper layer 50 and lower layer 52 also each have a generally semi-circular shape.

The assembly 30, 30A, 30B, 30C, 30D comprises an opening 76 between the upper mounting portion 34 and lower mounting portion 36, 36A, 36B, 36C, 36D. The accessory is positioned within the opening 76 when it is mounted. The opening 76 is defined by the inner surfaces 38, 42 of the upper and lower mounting portions 34, 36, 36A, 36B, 36C, 36D. When the upper layer 50 and lower layer 52 are affixed to the inner surfaces 38, 42 of the upper and lower mounting portions 34, 36, 36A, 36B, 36C, 36D, the opening 76 is defined or at least partially defined by the layers 50, 52.

As-noted above, the inner surfaces 38, 42 of the upper and lower mounting portions 34, 36, 36A, 36B, 36C, 36D and the upper and lower layer 50, 52 of the overmoldings 46, 48 may each have a semi-circular shape. In these embodiments, the inner surfaces 38, 42 and/or the layers 50, 52 align to provide the opening 76 with a circular or generally circular shape. However, while the opening 76 preferably has a circular shape, the assembly 30, 30A, 30B, 30C, 30D is not limited to a circular opening. As such, the opening 76 may be of a generally rectangular, elliptical, triangular, or of another shape. It should also be noted that the dimensions of the opening 76 are not particularly limiting. Thus, the attachment assembly 30, 30A, 30B, 30C, 30D can be utilized with accessories of different sizes and shapes.

The upper mounting portion 34 and lower mounting portion 36, 36A, 36B, 36C, 36D may each comprise at least one connecting section 78, 80. As depicted, the upper mounting portion 34 and lower mounting portion 36, 36A, 36B, 36C, 36D may each have a pair of connecting sections 78, 80. In these embodiments, a connecting section 78 of the upper mounting portion 34 contacts and is attached to a connecting section 80 of the lower mounting portion 36, 36A, 36B, 36C, 36D. As depicted, for example, in FIG. 5, screws 82 attach the connecting sections 78, 80 together. Although screws 82 are shown it should be appreciated other types of fasteners could be utilized to attach the upper mounting portion 34 to the lower mounting portion 36, 36A, 36B, 36C, 36D.

In certain embodiments, the lower mounting portion 36, 36A, 36B, 36C, 36D comprises a first leg 86, 86A, 86B, 86C, 86D and a second leg 88, 88A, 88B, 88C, 88D. In an embodiment, the first leg 86, 86A, 86B, 86C, 86D and second leg 88, 88A, 88B, 88C, 88D define a double dovetail slot 90. In the embodiment shown in FIGS. 1-5, a double dovetail slot 90 which is fixed is defined by the first and second legs 86, 88. In this embodiment, the first leg 86 and second leg 88 are formed in a unitary manner with the lower mounting portion 36.

A passage 94, 94A, 94B, 94C, 94D extends between opposite sides 96, 98 of the lower mounting portion 36, 36A, 36B, 36C, 36D. As shown, in certain embodiments, the passage 94, 94A, 94B, 94C, 94D comprises a first channel 100, 100A, 100C and a second channel 102, 102A, 100C. The first channel 100, 100A, 100C is provided through the first leg 86, 86A, 86C. The second channel 102, 102A, 102C is provided through the second leg 88, 88A, 88C. A middle channel 104, 104A, 104C may be provided between the first channel 102, 102A, 102C and second channel 104, 104A, 104C and connects the first and second channels to each other. As best shown in FIG. 18, in certain embodiments, the middle channel 104C is defined by a portion 106 of the outer surface 44 of the lower mounting portion 36C and a pair of sidewalls 108 formed on the lower mounting portion 36C.

In certain embodiments, the passage 94, 94C, 94D tapers from the second leg 88, 88C, 88D toward the first leg 86, 86C, 86D. For example and as shown in FIG. 5, a portion 110 of the first channel 100 may taper from an inner surface 112 to an outer surface 114 of the first leg 86, a portion 116 of the second channel 102 tapers from an outer surface 118 to an inner surface 120 of the second leg 88, and the middle channel 104 is reduced in depth from the second leg 88, 88C, 88D toward first leg 86, 86C, 86D. In other embodiments, the passage 94A, 94B does not taper. In these embodiments which are shown, for example, in FIGS. 8-12, the passage 94A, 94B has a diameter and may be cylindrically-shaped.

As illustrated, in certain embodiments, the firearm attachment assembly 30, 30A, 30B, 30C, 30D also comprises a member 122, 124. The firearm attachment assembly 30, 30A, 30B, 30C, 30D is selectively secured to the rail 500 with the member 122, 124. As illustrated in FIGS. 7 and 22, when the firearm attachment assembly 30, 30A, 30B, 30C, 30D is secured to a rail 500, the member 122, 124 is transversely disposed through the assembly 30, 30A, 30B, 30C, 30D. In an embodiment which is illustrated, for example, in FIG. 7, the member may be a wedge 122. In another embodiment which is illustrated, for example, in FIG. 9, the member may be a bolt 124. Preferably, the bolt 124 is a carriage bolt. As shown, a nut 126 may be attached to an end of the member 122, 124.

Preferably, in embodiments where the firearm attachment assembly includes a tapered passage, the assembly is secured to the rail 500 with the wedge member 122. As best shown in FIG. 6, the wedge member 122 comprises a portion 128 having a top surface 130 which tapers from a first end 132 to a middle portion 134. This portion 128 also has a flat bottom surface 136. The wedge member 122 may also comprise a threaded portion 138 attached to the middle portion 134. The threaded portion 138 has a generally cylindrical shape and threads 140 disposed on an outer surface thereof.

As shown in FIGS. 23 and 24, the wedge member 122 is not limited to use in securing a firearm attachment assembly to the rail 500. For example, in certain embodiments (not depicted), a riser 502, 504 may be utilized above a rail 500 secured to a weapon. The riser 502, 504 provides a Weaver or Picatinny type mount and is spaced above the rail 500. In these embodiments, the wedge member 122 may be utilized to secure the riser 502, 504 to the rail 500 or directly to a weapon.

The riser 502, 504 may comprise a passage 94E which tapers from one side 506 toward an opposite side 508 of the riser 502, 504. Further, at least one wedge member 122 is transversely disposed through the riser 502, 504. It should be appreciated that the firearm attachment assembly 30, 30A, 30B, 30C, 30D can be attached to either riser 502, 504. Additionally, when a plurality of firearm attachment assemblies 30, 30A, 30B, 30C, 30D are utilized, a plurality of risers 502, 504 may be employed. Also, it should be appreciated that the size of the riser 502, 504 can be varied to provide a desired amount of rise and length.

As illustrated in FIGS. 1-5 and 7, the firearm attachment assembly 30 may comprise a lower mounting portion 36 that includes a pair of unitarily formed legs 86, 88. Preferably, in the embodiments of FIGS. 1-5 and 7, the member is a wedge 122. In other embodiments of the firearm attachment assembly 30A, 30B, 30C 30D, like those depicted in FIGS. 8-12 and 14-22, at least one of the first leg 86A, 86B, 86C, 86D and the second leg 88A, 88B, 88C, 88D are not formed in a unitary manner with the lower mounting portion 36A, 36B, 36C, 36D. As shown in FIGS. 8-11, 14-15 and 17-22, in certain embodiments, the first leg 86A, 86C and the second leg 88A, 88C are not formed in a unitary manner with the lower mounting portion 36A, 36C. In these embodiments, both the first leg 86A, 86C and the second leg 88A, 88C are rotatable. Also, in these embodiments, it is preferable that the member is a bolt 124. However, as illustrated in FIGS. 12 and 16, in certain embodiments, the firearm attachment assembly 30B, 30D may comprise a lower mounting portion 36B, 36D having a first leg 86B, 86D not formed and a second leg 88B, 88D which is formed in a unitary manner with a lower mounting portion 36B, 36D. As should be appreciated from FIG. 12A, in these embodiments, the first leg 86B, 86D is rotatable. Also, in these embodiments, it is preferable that the member is a bolt 124.

FIG. 13 best illustrates the second leg 88A of FIGS. 8-11. As shown in FIG. 10, when attached to the lower mounting portion 36A of the firearm attachment assembly 30A, the second leg 88A is rotatable about an axis of rotation 142. Referring now to FIG. 13, in an embodiment, the second leg 88A comprises a pin portion 144. The pin portion 144 is aligned with the axis of rotation 142 and defines a hollow space 146 which receives a retaining member 148.

As depicted, the retaining member 148 comprises a head 150 and a cylindrical portion 152. The head 150 may be circular and have a diameter 154 which is greater than a diameter 156 of the cylindrical portion 152. A plurality of projections 158 may extend from cylindrical portion 152. Certain projections 158 may be aligned to form a row 160 of projections. A plurality of rows 160 may be provided over cylindrical portion 152. The projections 158 are in frictional contact with the pin portion 144 to help secure the leg 88A to the lower mounting portion 36A. Each retaining member 148 may be formed of plastic or material(s) similar to the material(s) used to form the lower mounting portion.

The pin portion 144 is in a perpendicular relationship with a channel 102A extending through the second leg 88A. The channel 102A extends from an inner surface 120A to an outer surface 118A of the second leg 88A. As should be appreciated, the channel 102A receives a portion of the member 124 when the firearm attachment assembly 30A is attached to a weapon. The second leg 88A may also comprise a concave surface 162 which is in a perpendicular relationship with the channel 102A. As shown in FIG. 10, when the second leg 88A is attached to the lower mounting portion 36A, the concave surface 162 faces a convex surface 164 provided on the lower mounting portion 36A. Referring back to FIG. 13, a convex surface 166 defines an upper edge of the second leg 88A. As shown in FIG. 9, the convex surface 166 faces a concave surface 168 of the lower mounting portion 36A when the second leg 88A is attached to the lower mounting portion 36A.

In the embodiments shown in FIGS. 8-12 and 12A, the first legs 86A, 86B are of the same configuration and are similar in configuration to the second leg 88A. As such, the retaining member 148 may be utilized with and received by the first leg 86A, 86B to secure each leg 86A, 86B to its respective lower mounting portion 36A, 36B. Also, the first leg 86A, 86B shown in FIGS. 8-12 rotates in a manner which is similar to the manner of the rotatable second leg 88A.

Referring now to FIG. 11, the lower mounting portion 36A may also comprise a first receiving portion 170A and a second receiving portion 172A. The first and second receiving portions 170A, 172A are positioned on opposite sides 96, 98 of the lower mounting portion 36A. Also, the first and second receiving portions 170A, 172A define separate spaces 174A. Each space 174A is of a generally cylindrical shape.

As shown best in FIGS. 10-11, the first receiving portion 170A receives the pin portion 144 of the first leg 86A and the second receiving portion 172A receives the pin portion 144 of the second leg 88A. Once received, the pin portions 144 cooperate with first and second receiving portions 170A, 172A, respectively. Whereas, in the embodiment illustrated in FIG. 12, the lower mounting portion 36B comprises only a first receiving portion which receives the pin portion 144 of the first leg 86B. Thus, once received, the pin portion 144 cooperates with the first receiving portion.

The firearm attachment assembly 30C which is illustrated in FIGS. 14-15 and 17-22 also comprises a first leg 86C and a second leg 88C which are rotatable. In this embodiment, the first leg 86C comprises a pin portion 144C and the second leg 88C comprises a pin portion 144C. The pin portions 144C are separately received in a space 174C by first and second receiving portions 170C, 172C of the lower mounting portion 36C and cooperate therewith.

Referring now to FIGS. 14 and 17, the lower mounting portion may comprise a stop 176. In an embodiment, a stop 176 is attached to each receiving portion 170C, 172C. Preferably, each stop 176 is located at an end of each receiving portion 170C, 172C. In an embodiment, a stop 176 is attached to each receiving portion 170C, 172C at the same end. However, in other embodiments, stops 176 may be provided on opposite ends of the receiving portions 170C, 172C. The stop 176 extends from a sidewall of the receiving portion 170C, 172C. The stop provides precise positioning of the first leg 86C when it is received by the first receiving portion 170C and/or the second leg 88C when it is received by the second receiving portion 172C. Referring now to FIG. 14, in certain embodiments, a crest 178 is provided on a side 96, 98 of each of the first and second receiving portions 170C, 170D, 172C. In other embodiments shown, for example, in FIGS. 11 and 12, a side projection 179 may be provided on a side 96, 98 of the first and second receiving portions 170A, 170B, 172A.

In the embodiment of the firearm attachment assembly 30D illustrated in FIG. 16, the first leg 86D and a first receiving portion 170D are configured as the first leg 86C and first receiving portion 170C illustrated in FIGS. 14-15 and 17 are above-described. However, the second leg 88D is formed in a unitary manner with a lower mounting portion 36D.

FIGS. 7 and 22 show embodiments of the firearm attachment assembly 30, 30C assembled and secured/attached to a rail 500. As above-noted, it is preferred that the firearm attachment assembly 30 is attached to a Weaver or Picatinny rail 500. Generally, the Weaver or Picatinny rail 500 has a T-shaped cross section. Opposing edges of the top of the T are angled at 45° from top to bottom. As illustrated in FIG. 7, a plurality of parallel slots 510 are provided and spaced in the longitudinal direction along the top 512 of the rail 500. The rail 500 will typically extend in a longitudinal direction and, when attached to a weapon, be provided such that it is positioned on top of the weapon bore.

The firearm attachment assembly 30, 30A, 30B, 30C, 30D is utilized for mounting, affixing, and aligning the accessory in a generally longitudinal direction that is parallel to the weapon bore. Although it is preferable that the firearm attachment assembly 30, 30A, 30B, 30C, 30D mount the accessory on top of and parallel to the weapon bore, it should be appreciated that the firearm attachment assembly 30, 30A, 30B, 30C, 30D can be utilized to mount an accessory on the top, bottom, or a side of the weapon.

The firearm attachment assembly 30, 30A, 30B, 30C, 30D may be secured to a weapon by a variety of methods.

In one embodiment, the firearm attachment assembly 30, 30A, 30B, 30C, 30D is provided and slid longitudinally over the top 512 of the rail 500 from either end, until the assembly 30, 30A, 30B, 30C, 30D is positioned over a slot 510. The firearm attachment assembly 30, 30A, 30B, 30C, 30D is secured to a rail by aligning the passage 94, 94A, 94B, 94C, 94D with the slot 510 on the rail. A member 122, 124 is then inserted into the passage 94, 94A, 94B, 94C, 94D. The member 122, 124 is positioned between opposite sides of the slot 510 to secure the attachment assembly 30, 30A, 30B, 30C, 30D to the rail 500. In certain embodiments, the nut 126 is threaded onto the member 122, 124 and tightened. The member 122, 124 cooperates with the passage 94, 94A, 94B, 94C, 94D and the rail 500 to rigidly secure the lower mounting portion 36, 36A, 36B, 36C, 36D to the rail 500. The alignment of the lower mounting portion 36, 36A, 36B, 36C, 36D relative to the rail 500 is precise each time the lower mounting portion 36, 36A, 36B, 36C, 36D is removed and reattached to the rail 500, even when positioned over a different slot on the rail 500.

In another embodiment, a method which allows for the adjustment to the width of the dovetail slot 90 is provided. This method of attachment will be described as practiced with the firearm attachment assembly 30C depicted, for example, in FIGS. 14 and 15 and utilizing FIGS. 17-22. However, it should be appreciated that this method is capable of being practiced with other embodiments of the firearm attachment assembly 30A, 30B, 30D.

As illustrated in FIG. 17, the method of attachment comprises providing the firearm attachment assembly 30C. As illustrated, the wedge member 122 is shown. However, it should be appreciated that the method can be practiced utilizing other embodiments of the member 122, 124.

As shown in FIG. 18, at least one of the first leg 86C and second leg 88C is attached to the lower mounting portion 36C by inserting the pin portion 144C into the space 174C defined by the receiving portions 170C, 172C. In an embodiment, each pin portion 144C travels through the space 174C until the pin portion 144C contacts the stop 176 located at the end of the receiving portion 170C, 172C. The stop 176 prevents the pin portion 144C from further travel through the receiving portion 170C, 172C, respectively.

As shown in FIG. 18, when both legs 86C, 88C are attached to the lower mounting portion 36C, the method of attachment may comprise rotating at least one of the legs 86C, 88C vertically about an axis of rotation 142C. In the embodiment shown in FIGS. 19 and 20, both legs 86C, 88C can be rotated vertically about an axis 142C. Rotation of the legs 86C, 88C can be limited in an upward direction by providing a crest 178 adjacent each receiving portion 170C, 172C or by another portion of the lower mounting portion 36C. The amount of rotation or limitation thereto can be selected. Thus, the size and shape of each crest 178 can be selected to provide a desired amount of rotation or limitation thereto. Similarly, opposing end portions 180 of the sidewalls 108 or other portions of the lower mounting portion 36C can be utilized to limit the rotation of the legs 86C, 88C about their respective axis of rotation 142C in the opposite direction.

The method of attachment may also comprise providing the lower mounting portion 36C over the rail 500 as shown in FIGS. 19-21. Specifically, in an embodiment, the lower mounting portion 36C may be provided such that it is positioned over any one of the parallel slots in the top of the rail 500. In this embodiment, the opening 76 of the assembly 30C is axially aligned with the rail 500.

The method of attachment may also comprise rotating at least one leg 86C, 88C to provide at least one leg 86C, 88C adjacent the rail 500. If both legs are rotatable, then the method may comprise rotating both legs 86C, 88C such that the legs 86C, 88C are provided adjacent the rail 500. As shown in FIG. 20, after rotating the at least one leg 86C, 88C, the first leg 86C is separated from the second leg 88C by the rail 500. A gap 182 may be provided on both sides of the rail 500 between the first leg 86C and the rail 500 and the second leg 88C and the rail 500 as shown.

As depicted in FIG. 20 and above-discussed, the legs 86C, 88C are aligned with the lower mounting portion 36C and the rail to provide a pathway which extends from one side 96 to an opposite side 98 of the lower mounting portion 36C and through the rail 500. In the illustrated embodiment, the pathway comprises the passage 94C. The passage 94C is positioned such that it is aligned with a slot in the top of the rail 500. The method of attachment may comprise positioning the threaded portion 138 of the member 122 adjacent one end of the passage 94C as shown.

To secure the firearm attachment assembly 30C to the rail 500, the member 122 is inserted into the pathway. As shown in FIG. 21, after the member 122 is inserted into the passage 94C, the member 122 is transversely disposed through the firearm attachment assembly 30C. Insertion of the member 122 into the pathway also positions a portion of the member 122 between opposite sides of the slot. Positioning a portion of the member 122 between opposite sides of the slot provides an interference fit between the member 122 and the slot such that the assembly 30C cannot move along the longitudinal direction along the rail 500. When the wedge member 122 is utilized and inserted through the passage 94C, the top surface of the tapered portion contacts a top surface 184 (shown in FIG. 18) of the passage 94C and the flat bottom surface of the tapered portion contacts a bottom surface 186 (shown in FIG. 17) of the passage 94C. Contact by the wedge member 122 acts on the passage 94C such that a force is exerted on at least a portion of the top and bottom surfaces 184, 186 of the passage 94C to secure the elements of the firearm attachment assembly 30C together and the assembly 30C to the rail 500.

The method may also comprise rotating the nut 126 onto the threaded portion 138 of the member 122. In certain embodiments, a washer (not depicted) may be provided between the nut 126 and the outer surface of the first leg 86C.

After securing the lower mounting portion 36C to the rail 500, the screws 82 may be removed from the assembly 30C. Removing the screws 82, allows the upper mounting portion 34C to be detached from the lower mounting portion 36C. As above-noted, when mounting an accessory to the rail 500, two or more firearm attachment assemblies 30C may be secured to the rail 500. Thus, two or more lower mounting portions 36C may be first secured to the rail 500. After detaching the upper mounting portions 34C from the lower mounting portions 36C, the accessory may be positioned on the lower overmoldings 48. Next, the upper mounting portions 34C are positioned over the accessory such that the upper overmoldings 46C contact the accessory. Subsequently, the upper mounting portions 24 are attached to the lower mounting portions 26 by reinserting the screws 82.

By way of any of the above-described embodiments, the firearm attachment assembly 30, 30A, 30B, 30C, 30D consistently and precisely orients an accessory each time the accessory is mounted without scratching or denting the accessory.

In accordance with the provisions of the patent statutes, the principles and modes of operation of this invention have been described and illustrated in its preferred embodiments. However, it must be understood that the invention may be practiced otherwise than specifically explained and illustrated without departing from its spirit or scope. 

1. A firearm attachment assembly, comprising: an upper mounting portion; a lower mounting portion attached to the upper mounting portion, wherein the upper mounting portion and the lower mounting portion each have an inner surface; and a layer affixed to and covering at least a portion of the inner surface of the upper mounting portion and at least a portion of the inner surface of the lower mounting portion.
 2. The assembly defined by claim 1, wherein the layer is permanently affixed to the inner surface of the upper mounting portion and the inner surface of the lower mounting portion.
 3. The assembly defined by claim 1, wherein the layer comprises a composite material.
 4. The assembly defined by claim 1, wherein the layer has a hardness which is less than the hardness of the upper mounting portion and the lower mounting portion.
 5. The assembly defined by claim 1, wherein the layer is elastomeric.
 6. The assembly defined by claim 1, wherein the layer is thermoplastic.
 7. The assembly defined by claim 1, wherein the upper mounting portion and the lower mounting portion each comprise nylon and carbon fibers.
 8. The assembly defined by claim 1, wherein the upper mounting portion and the lower mounting portion each comprise nylon and glass.
 9. The assembly defined by claim 2, wherein the layer comprises a portion which is disposed between the inner surface and an outer surface of the lower mounting portion.
 10. The assembly defined by claim 2, wherein the layer is separately interlocked with the upper mounting portion and the lower mounting portion.
 11. The assembly defined by claim 1, further comprising a first leg attached to the lower mounting portion and a second leg opposing the first leg and attached to the lower mounting portion.
 12. The assembly defined by claim 11, wherein the lower mounting portion comprises a first receiving portion and the first leg comprises a pin portion attached to the first receiving portion.
 13. The assembly defined by claim 11, wherein the second leg is formed in a unitary manner with the lower mounting portion.
 14. The assembly defined by claim 11, further comprising a member transversely disposed through the lower mounting portion.
 15. The assembly defined by claim 11, wherein the first and second leg are formed in a unitary manner with the lower mounting portion.
 16. The assembly defined by claim 12, wherein the lower mounting portion further comprises a second receiving portion and the second leg comprises a pin portion attached to the second receiving portion.
 17. A member for a firearm attachment assembly, comprising: a portion which tapers from a first end to a middle portion; and a threaded portion attached to the middle portion.
 18. A method for securing an attachment assembly to a weapon, comprising: providing an attachment assembly comprising a passage formed there through; positioning the attachment assembly over a slot in a rail such that the passage is aligned with the slot; and inserting a member into the passage and between opposite sides of the slot to secure the attachment assembly to the rail.
 19. The method defined by claim 18, wherein the attachment assembly further comprises a lower mounting portion having a first leg and a second leg and wherein the passage is formed through the first leg and second leg.
 20. The method defined by claim 19, further comprising rotating the first leg about an axis to position the first leg adjacent the rail such that the first leg is separated from the second leg by the rail. 